GE JN327 Ventilation Hood User Manual


 
7
DUCT EQUIVALENT NUMBER
PIECES LENGTH x USED = TOTAL
3
1
4x 10 1 Ft. x ( ) = Ft.
Rect.,
straight
7Round, 1 Ft. x ( ) = Ft.
straight
6Round, 1 Ft. x ( ) = Ft.
straight
3
1
4x 10 14 Ft. x ( ) = Ft.
Rect. 90°
elbow
3
1
4x 10 8 Ft. x ( ) = Ft.
Rect. 45°
elbow
3
1
4
x 10 33 Ft. x ( ) = Ft.
Rect. 90°
flat elbow
3
1
4x 10 24 Ft. x ( ) = Ft.
Rect.
(18 ft. w/o
wall cap
damper)
x ( ) = Ft.
with
damper
3
1
4
x 10 2 Ft. x ( ) = Ft.
Rect. to
6round
transition
3
1
4x 10 4 Ft. x ( ) = Ft.
Rect. to
6round
transition
90° elbow
6Round, 12 Ft. x ( ) = Ft.
90° elbow
6Round, 7 Ft. x ( ) = Ft.
45° elbow
Subtotal column 1 = Ft.
WORKSHEET—CALCULATE TOTAL EQUIVALENT DUCTWORK LENGTH
DUCT EQUIVALENT NUMBER
PIECES LENGTH x USED = TOTAL
6Round 24 Ft. x ( ) = Ft.
wall cap
(18 ft. w/o
with
damper)
x ( ) = Ft.
damper
6Round 33 Ft. x ( ) = Ft.
roof cap
6Round 2 Ft. x ( ) = Ft.
to
3
1
4x 10
rect.
transition
6Round 4 Ft. x ( ) = Ft.
to
3
1
4x 10
rect.
transition
90° elbow
7Round, 14 Ft. x ( ) = Ft.
90° elbow
7Round, 9 Ft. x ( ) = Ft.
45° elbow
7Round 28 Ft. x ( ) = Ft.
wall cap (
21 ft. w/o
with
damper)
x ( ) = Ft.
damper
7Round 39 Ft. x ( ) = Ft.
roof cap
7Round 1 Ft. x ( ) = Ft.
to
3
1
4x 10
rect.
transition
7Round 5 Ft. x ( ) = Ft.
to
3
1
4x 10
rect.
transition,
90° elbow
Subtotal column 2 = Ft.
Subtotal column 1 = Ft.
Total ductwork = Ft.
Installation Instructions
MAXIMUM DUCT LENGTH: For satisfactory air
movement, the total duct length of a 3
1
4 x 10
rectangular, 6 or 7 diameter round duct should
not exceed 65 equivalent feet.